Re: [JAVA2D] Memory and images

[John Wells]

Chet Haase wrote:

John,

Also, what release are you using?  There was a major fix in
5.0 that eliminated some of the temporary images we used when
loading images through some mechanisms; these temporary images
tended to bloat the footprint way beyond what you could expect.

There may be some paths where we still do this; what methods are you
using to load the images?  What images types are you loading?

Guys,

Thanks for the reponses.  I'll try to answer best I can (I'm an imaging
newbie, so still coming up to speed on some terminology...perhaps half
my problem? ):

I'm currently using JDK 1.4.2. with JAI 1_1_2_01.  I will try to use JDK
1.5 and see if it makes a difference at all.

Regarding tiling, you've only led me to realize I have a lot to learn
:-).  Average size of a grayscale TIFF is approximately 350 KB.  Average
size of JPEG is around 150-200KB.

Regarding what I'm using to load the images, I'm simply using some
example code I found somewhere in the documentation.  My application
only supports TIFFs and JPEGS.  In the below code, DocImage is simply
BufferedImage extended with some extra metadata for my use:

public static DocImage readJPEG(File file) throws IOException {
   BufferedImage image = null;
   DocImage rImage = null;
   image = ImageIO.read(file);
   if (null!=image) {
     rImage = DocImage.convertToDocImage(image);
     rImage.setImageType("JPEG");
   }
   return rImage;
 }

public static DocImage readTiff(File file) throws IOException {
   BufferedImage image = null;
   DocImage rImage = null;
   FileSeekableStream stream = null;
   stream = new FileSeekableStream(file);
   ParameterBlock params = new ParameterBlock();
   params.add(stream);
   TIFFDecodeParam decodeParam = new TIFFDecodeParam();
   decodeParam.setDecodePaletteAsShorts(true);
   RenderedOp image1 = JAI.create("tiff", params);
   image = image1.getAsBufferedImage();
   if (null!=image) {
     rImage = DocImage.convertToDocImage(image);
     rImage.setImageType("TIFF");
   }
   return rImage;
 }

Thanks for your help.  If I can provide any further info that might help
you make sense of my problem, please let me know.

Thanks!
John

===========================================================================
To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
of the message "signoff JAVA2D-INTEREST".  For general help, send email to
[EMAIL PROTECTED] and include in the body of the message "help".